すっぽんきのこでわありませんでした
鼈茸ではありませんでした
supponkinokodewārimasendeshita

Noun
Desu Copula

The polite, past negative form of すっぽんたけ

1. Was not a turtle mushroom.; Was not a soft-shelled turtle mushroom.

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana